Thiophosphoric acid ester compounds



Bin!

company of Great Britain a Y lio Buaw mg. Eiied 1 196 2, Ser. No. 2,354

( Claims priority, application Great Britain 3am. 2t); 1959 32% Claims. (2. 2161-22) This invention concerned with improvements in or to relating to pest control agents.

The invention provides new compounds of the general formula:

FS-Z--R3 in which Z is a sulphur atom or an --SO;;- group;

R and R may be the same or different and each an 29 alkyl group containing 1-4 carbon atoms and R is one of tile following groups:

(i) a substituted thiocarbamoyl group, viz,

s R H CN in which R is a hydrogen atom or an aiityl group and R is an alkyl group; 30 {ii} an alkoxythiocarbouyi group tile.

ll -c-0ru Where i. 5 is an aikyl group); (iii) no atlcyl group, which may substituted; (iv) an aryl or substituted aryi group, or (v) a heterocyciic or substituted heterocyclic group. The new compounds according to the invention have do interesting pest control properties, in particular, high acaricidal activity; at thesame time the new compounds possess a generally low mamrnaiian toxicity. Some of the compounds also possesses aphici ial and fungicidal activity and this of course makes them particularly interestin as multiection pest control agents.

The compounds according to general Formula I in which R is a monoor diallryl thiocaroamoyl group are particularly important since members of these classes in addition to being potent acaricides also possess fungicidal 0 activity of a high order against various common plant fungal pathogens e.g. Ventzzrza inaequalis. The alkyl groups (R and R in these compounds may contain from 1-32 carbon atoms and preferably are methyl or ethyl groups,

Where the group R is an unsubstituted alkyl group it may contain l-l2 carbon atoms and preferably contains 14 carbon atoms. However R (:aikyl) may be substituted e.g. with aryl or heterocyclic substitueuis.

Thus R and R may be a methyl, ethyl, mpwnyl, isopropyl or butyl group.

R may be hydrogen or a methyi, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, n-hexyl, cyclohexyl, n-nonyi or d-odecyl group, and

R and R may each be a methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyi, n-hexyl, cycloheityl, n-nonyl or dodecyl group.

Where R is an unsubstituted alkyl group it may be methyl, ethyl, n-propyl, isopropyl, n-nonyl or dodecyl. R may be an alkyl group in which a carbon-carbon bond is interrupted by a sulphur or an oxygen atom. R may be substituted by a choloro atom or by any of the following groups: ritro, pheuyi substituted phenyi groups, including chlorophenyls and nitropheuyis, uapht uyi, furyl, thiophene, allcylthio, etc.

Where R is an aryl or substituted aryl group it may be phenyl or naphthyl or either of these groups substituted with one or more chloro, nitro, etc. groups.

Where R is a heterocyciic or substituted hcterocyciic it may be e.g. thiazoline, henzthiazole, etc.

Where the compounds according to the invention in.- clnde basic groups in the molecule, it will be clear that acid addition salts of su h compounds may be prepared and it is to be understood that such salts are intended to be within the scope of the invention. Such salts include the hydrochlorides and other salts containing inorganic acid residues as Well as salts formed with organic residues such as hydrogen oxaiates, etc.

Compounds according to the invention which are of particular interest having regard to their high acaricidal, insecticidal and fungicidal activity are:

(cnI o i sstiN cHm 0,0-diethyl S-l*l,N-dimethyldithio-carbarnoyl phosplnrothiolate is. the reaction product of diethoxyoxop'aosphorane sulohenyl chloride and sodium izN-dirnetEyidi thiocarbamate, and

, thiolate i.e. the reaction product of diethoayoxophosphorane sulphenyl chloride and sodium Nzl i-diethyldithiocarbamate. Compound (a) has a particularly high acaricidal and fungicidal activity.

Other compounds according to the invention which of interest include:

033 cli-isopropyl S-(N,N-dimethyldithiocarhamoyi) phosphorothiolate:

H H CHmHC01;1 -ss-cN(CHt LiO-diethyl S-(N,N-diethyidithiocarbsrnoyl) phosphorothiolate:

s H [(CHsHHCO]QP-SS-i-N(C H5)I QO-di-n-butyl S-(N,N-diemethyldithiocarbarnoyl) phosphorothioiate:

rot'hiolate:

(C4IIs0)zi S-*S- -N(C2HE-)2 0,0-diethyi S-(ethoxydithiocarbonyl) phosphorotliiolate:

ll (C=H5O)=P- S-SCOC;H5 0,0-diethy1 S-(thioethyl) phosphorothiolatez o ciiri0 zi -s-sciu5 0,0-diethyl S-(thiophenyi) phosphorothiolate:

0 2 t )2I --SSC H 0,0-diethyl S-(Zmercaptofurfuryl) phosphorothiolate:

1| fi F ctnso)n s-s-cui.o CH

o QOdiethyl Sdfi-thioethyl-Lic-atbyl) phosphorothislate:

citrio ii -s-souns-onti QC-diethyl S-(p-tolylsulphonyl) phosphcrotl'iiolate:

i --sx V R 0 :1 (where R and R have the meanings defined above and X is chlorine. bromine or iodine but preferably chlorine) with a compound of the genera formula:

(where R and 2 have the meanings defined above and M is a hydrogen or an alkali metal or ammonium), if desired in solution or suspension in the presence of a solvent. The reaction is preferably carried out at room temperature in the absence of applied heat. it the reaction is slow the reactants may be heated but care should be exercised to avoid overheating otherwise unwanted sidereactions may occur.

Where M is hydrogen an acid binding agent may be used if desired.

Suitable solvents are benzene, petroleum ether, etc.

It should be noted that under the action of heat or on standing the compounds awording to the invention may be converted from the a ll l =i --S form to the: -O- form The new compounds according to the invention may be formulated for use in any desired way. Generally such formulations will include insecticidal compound or toxicant in association with a suitable carrier or diluent. Such carriers may be liquid r solid and designed to aid the application of the toxicant either by way of dispersing it where it is to be applied or to provide a formulation which can be made by the user into a dispcrsible preparation.

Liquid preparations thus include preparations of the toxicant in the form of solutions or emulsions which can be used on their own 01' be adapted to be made up with water or other diluents to form sprays etc; in such cases the carrier is a solvent and/or emulsion base nouphytc= toxic under the conditions of use. Generally such prep arations will include a wetting, dispersing or emulsifying agent. Other liquid preparations include aerosols in which the toxicant is associated with a liquid carrier or propellant.

Solid preparations include dusts and wettable powders, granulates and pellets, and semi-solid preparations such as pastes. Such preparations may include solid or liquid diluents such as clays, which may themselves have wetting properties, and/or wetting, dispersing or emulsifying agents; binding and/or adhesive agents may also be ineluded. Solid preparations also include thermal fumigating devices wherein the toxicant is associated with a solid pyrotechnic component.

The compounds according to the invention may be used, if desired, in admixture with compatible insecticides and/or fungicides.

For the better understanding of the invention the following examples are given by way of illustration only. In these examples temperatures are given in degrees centi grade, unless otherwise stated, and parts unless otherwise stated are by weight. Where parts by weight and parts by volume are mentioned together these are to be takenas having the relationship of grams to ccs.

d1. Emmphz I A solution of 81.8 g. of diethoxyonophosphcraue sulphenyi chloride in 256 cc. of benzene was added over a period of 10 minutes to a stirred, ice-cooled suspension of 75.2 g. of sodium dimethyl dithiocarbamate (2 /2 H O) in 300 cc. of benzene. The temperature rose to 30 C. After stirring for 1 hour and standing overnight. the mixture was washed with water, then with a saturated aqueous solution of sodium bicarbonate, and again with water. The aqueous washings were extracted with benzene, and the extract was combined with the original benzene solution and dried over anhydrous sodium sulphate. After filtration from sodium sulphate, the benzene was stripped oi? at a temperature of 60 C. and a pressure of 40 mm. The resulting product consisted of a mixture of an oil solid in approximately equal proportions. The mixture weighed ll3.6 3. Found: N, 4.2; P, 13.2%. O,()-diethyl S-(b!,N-dimethyldithiocarbamoyl) ph0sphorothiolate C l-i hlil PS requires 4.8 P, 10.7%. The product is a very active pesticide and has a favourable mammalian toxicity.

The oral LDSO of this wmpolmd was llG' nag/lg. to mice.

The compound showed remarkable fungicidal activity against the spores of Venturia inaequalis and Cercospora melonis. The 11395 values of this compound were 7 parts per million against Venturia and 40 parts per million against Cercospora. (H395 value is the concentration of the toxicant which inhibits of the spores from germination; the test used was that described by Montgomcry and Moore, 3. Pomoh, 1933, 15, 253.)

The product of this example was formulated as follower 7 (a) 7 parts or: Calfio E (a highly absorbent finely divided inert inorganic carrier) were added to 25 parts of the above tom'cant with stirring. To the mixture were added 58 parts of war finely divided kaolin and 10 parts of sulphite lye powder. The whole mixture was then ground to a time powder, which passed through a sieve containing 30!) meshes to the inch, yielding a 25% wcttable powder possessing good suspension properties in water.

This wettable powder was diluted with water to contain 0.0025% of the toxicant. Dwarf bean plants infested with Greenhouse Red Spider, which were resistant to high concentrations (0.05%) of a number of organophosphorus insecticides such as schradan (octarnethylpyrophosphoramide) and parathion {0,0-diethyl O-p-nitrophenyl phosphorothioate}, were dipped in this mixture and observations were made after 48 hours, when it was found that all the spiders on the plants were killed.

The 25% wettable powder was diluted with water to contain 0.1% of the torticant. Apple rootstoclrs were sprayed with the above mixture to run-off. The deposit was allowed to dry tor 4-6 hours. The treated rootstoclcs were then transferred to an infection chamber, sprayed with a suspension of spores of Verzfuria inaequalis and ltept at 60-65 F. for 48 hours. The rootstoclcs were then removed from the infection chamber and an assessment of the infection carried out 21 days later. Almost complete protection from apple scab was achieved.

Cucumber plants were also sprayed to run-off with the 25% wettable powder diluted with water to contain 0.1% of the toxicant. The deposit was allowed to dry and the plants were lightly dusted with spores of cucumber mildew (Erysiphe cichoracearum). Treatments with the toxicant were repeated at weekly intervals and weekly assessments of the infection were carried out. It was found that complete protection against the infection was obtained on the treated plants.

Both in the apple scab tests and cucumber mildew tests suitable controls were used.

(b) The product of this example was also formulated as a 2% dust as follows: 2 parts of the product were intimately mixed with 73 parts of a. finely divided china clay, and to the mixture were added 25 parts of a pre- Go? viously prepared mixture consisting of 80 parts of the finely divided china clay and 20 parts of parallin wax. Dwarf bean plants infested with Greenhouse Red Spider resistant to schradan and parathion were dusted with this 2% dust at the rate or" 23 lbs. per acre. Observations made after 48 hours showed all the spiders to be dead.

The 2% dust was also used in tests on hops in Germany for the control of red spider mites. This spider was found before to be resistant to the well known and widely used insecticides Systox [a mixture of O,C diethy1 O-Z-(ethylthio)-ethyl phosphorothionate and the SYZ-ethylthiOethyl isomer] and l/letasystox" [a mixture of 0,0-dimethyl O-2-{ethylthio)-ethyl phosphorothionate and the S-Z-ethylthioethyl isomer]. The hops were dusted with the 2% dust. Complete kills were obtained after 24 hours of the nymphs, adults and overwintering females. The ltills obtained in parallel tests with Systox and i /letasystor. were poor.

c} it) parts by weight of the compound of this example and parts by weight of Lissapol NX (a polyethylene glycol ether) were made up to 1% parts by volume with acetone. This solution was diluted with water to contain 0.061% of the toxicant. Dwarf bean plants infested with Greenhouse Red Spider were dipped in this mixture and observations were made after 48 hours, when it was found that all tie spiders on the plants were killed. A dilution containing 9.01% of the toxicant gave a complete hill of aphids on bread beans in a parallel rest.

Example 2 A solution of 40.9 g. of diethoxyoxophosphorane sulphenyl chloride in 26 cc. of benzene was added over a period ol 8 minutes to a stirred, ice-cooled suspension of 45 g. of sodium diethyl dithiocarbamate (31 1 0) in 200 cc. of benzene. The temperature rose to C. After stirring 130F155 hours and allowing the mixture to stand overnight, it was worked up as in Example 1. The product, 0,0-diethyl S-(N,N-dielhylditl*iocarbamoyl) phosphorothiolate, a red-brown mobile oil, weighed 63 g.

This product was formulated as follows:

20 parts by weight of the toxicaut and parts by weight of Lissapoi NX were made up to 10-0 parts by volum with methanol. The solution was diluted with water to contain 0.6 0121% of the toxicant. Dwarf beans infested with Greenhouse Red Spider were dipped in this mixture and observations were made after 48 hours, when it was found that all the spiders on the plants were killed.

A dilution of 9.001% also gave a complete kill of aphids on broad beans in a parallel test.

The LD95 of this compound against Venruria inaequalis was 58 parts per million.

Example? A solution of 70 g. of diisopropoxyoxophosphorane sulphenyl chloride in cc. of benzene was added to an icecooled suspension of 5.6 g. of sodium dimethyl dithiocarbamate (2 /2H O) in 250 cc. of benzene. The temperature rose to 35 C. After stirring for 30 minutes and allowing the mixture to stand overnight, it was worked upas in Example 1. The product, 0,0-di-isopropyl S-(N,N- dimethyldithiocarbamoyl) phosphorothiolate, was obtained as a yellow mixture of solid and oil weighing 95 g.

This product was formulated as follows: 20 parts of the toxicant were mixed with 30 parts of Lissapol NX and made up to 100 parts or" volume with methanol. A solution was made up with water to contain 0.005% of the toxicant and broad beans infested with aphids were dipped in it. Observations were made after 48 hours when it was found that 99% of the aphids on the plants were dead.

In a parallel test a 99% kill of Greenhouse Red Spider was obtained on dwarf bean plants.

The product of this example was also formulated as a 25% wettable powder following the procedure of Example l. It gave a 98% control of apple scab on apple rootstocks by the test described in Example 1.

s o Example 4 A solution of 93 g. of diisopropoxyoxophospborane sulphenyl chloride in c.c. of benzene was added to a suspension of g of sodium dletliyl dithiocarbumai'e (3150) in 200 c.c. of benzene at 30-35 3. and the mixture was worked up as in Example 3. A red oil was obtained weighting 129 g. (Found: N, 3.5; P, 9.6%. 0,0di-isopropyl S-(NJJ-diethyldithiocarbamoyl) phosphorothiolate C ll NO PS requires N, 4.1% P, 9.0%).

This product was formulated as a 25% wettable powder as in Example 1. When tested at a concentration of 0.1% of toxicant for protection against Verzturia inacqna- [is on apple rootstoclrs by the technique described in Example 1 it gave 98.5% control of the infection. in the same test captan (N-trichloromethylmercapto-4-cycloh:xene-l,Z-dicarboximide) at 0.1% concentration gave a. control of the infection of 97.5%.

in a test for control of powdery mildew on cucumbers almost complete protection was achieved with a 25% wettable powder prepared and tested by the techniques described in Example 1.

The oil was also formulated as a 2% dust as in Example l. The dust was placed in a dish in a chamber in which cucumber plants were present. The dust was blown by compressed air and allowed to settle on the surface of the leaves during 15 minutes. The plants were then infected with spores of cucumber mildew (Erysiphe cicizoraceamm), the infection assessed after a week and dusted again with the toxicant dust, then another assessment wa :arried out after 1 week. Almost complete protection from infection with cucumber mildew was obtained on the treated plants whereas control plants became progressively more infected.

This product; also gave a control of Botrytis fabae on broad beans superior to that of zineb (zine ethylene bisdithiocarbamate).

Examplsf) A solution of ll7.2 g. of di-n-butoxyoxophosphorane sulphenyl chloride in 60 c.c. of benzene was added over a period of 9 minutes to a suspension of 84.6 g. of sodium dimethyl dithiocarbamate (2 5 0) in 30-0 cc. of benzene, at 25-35 C. After the addition, the mixture was stirred for 20 minutes and allowed to stand overnight. it was then treated as in Example 1. The product, 0,0-di-n-butyl S-(N,N-dimethyldithiocarbamoyl) phosphorothiolate, was a mixture of a dark brown oil and solid and weighed 127.5 g.

The product was formulated as a 25% wettable powder as in Example 1. When tested at a concentration of 0.l% of tcxicant for protection against Vent'uria i/zaequal'is on apple rootstocks by the technique described in Example 1 it gave 99% control of the infection (in the same test captan at a concentration of 0.1% of toxicant gave a control of 98% Example 6 To a suspension of 90 g. of sodium diethyl ditlliocarbamate (Bl-I 0) in 300 c.c. of benzene was added a solution of 104.2 g. of di-n-butoxyoxophosphorane sulphenyl chloride in 60 c.c. of benzene over a period of 8 minutes at 2535 C. After stirring for 26 minutes and standing overnight, the mixture was worked up as in Example 5 to yield 100.8 g. of a dark viscous oil. 0,0-di-n-butyl S-(N,N-diethyldithiocarbamoyl) phosphorothiolate.

In a test for powdery mildew on cucumbers, complete protection was achieved with a 2% dust prepared according to Example 1 and tested by the technique described in Example 4.

Example 7 To a suspension of potassium xamhate (16 g.) in 100 c.c. of benzene was added a solution of dielhoxyoxophosphorane sulphenyl chloride (20.4 g.) in 25 c.c. of benzene, while stirring and cooling with water. The temperature during the addition was ifs-ill". The reaction mixture was set aside overnight at room temperature and then Washed successively with water, a saturated aqueous solution of sodium bicarbonate and again with water. The aqueous washings were extracted with more benzene and the combined benzene extracts were dried over anhydrous sodium sulphate, filtered and the benzone was then stripped off at 60 and 48 mm. pressure. 0,0-diethyl S-(ethoxydithiocarbonyl) phospborothiolate was obtained as a dark brown, mobile oil weighing 16.2

The product was formulated as in Example 2 and the resulting solution was diluted with water to contain 0.000570 of the toxicant. Dwarf beans infested with Greenhouse Red Spider were dipped in this mixture and observations were made after 48 hours, when it was found that all the spiders on the plants were ltilled.

A dilution containing 0.01% of the toxicant gave a complete hill of apmds on broad in a parallel test.

Example 8 Ethyl rncrcaptau-i (3.1 g.) dissolved in 50 cc. of benzene and to it was added solution of diethozyono phosphorane sulphenyl chloride {10.2 g.) in 15 cc. of benzene while cooiiru and stirrin The ternoerature i3 3 of the reaction mixture was kept at 9-10. Hydrogen chloride gas evolved slowly. it was then set aside at room temperature for 16 hours, then kept for half-anhour at 70 and treated as in Example F. '0,0-dietbyl S-(thioethyl)phosphorothiolate was obtained a a dark, mobile oil weighing 5.2 g.

This product was formulated as in Example 2. The resulting solution was diluted with water to contain 0.001% of the tonicant. Dwarf beans infested with Greenhouse Red Spider were dipped in this mixture mo observations were made aite" 48 hours, whee we found that 98% of the spiders. on the plants were killcdm Example Diethoxyoxophosphorane sulphcnyl chloride (20.4 g.} dissolved in 25 cc. of benzene was added gradually, during 5 minutes, to a solution of thiophenol (ll g.) in 50 cc. of mnzene, with external water cooling stirring. The temperature of the reaction mixture lay between 12 and 28. Hydrogen chloride evolved rapidly. The reaction mixture was allowed to stand overnight and then treated as in Example QO-diethyl S-(thiophenyl) phosphorothiolate was obtained as a deep orange-red oil weighing 18.7 g.

The compound was formulated as in Example 2 and then diluted with water to contain 0.001% of the toxi cant. Dwarf beans infested with Greenhouse Spider were dipped in this mixture and observations made after 48 hours when it was icons that 95% of the spiders had been killed.

Example Diethoxyoxophosphorane sulphenyl chloride (29.4 g.) in 25 cc. of benzene was added gradually to a suspension of sodium Z-furfuryl mercaptide {13.6 g.) in 50 on. of

A solution of 3.7 g. of diethoxyonophosphorane sul- Exampie 12 A solution of 20.5 g. of dietlioxyoxcphosphorane sulphony! chloride in 26 cc. of benzene was added during it) minutes to a suspension or 17.8 g. of sodium p-toluene sulphinate in 50 cc. of benzene while stirring and cooling. The mixture was stirred for 36 minutes and then left overnight. it was washed with water, then with a saturated aqueous solution oi sodium bicarbonate and again with water. 't he were extracted with benzene, the benzene washings combined with the original benzene solution and dried over anhydrous sodium sulphate. "ter filtration of the sodium sulphate, the benzene was s off at a temperature 50 C. pressure of 326 mm. Hg. residual brown oil, QQ-die'thyl S-(o-tolylsulphonyl) pbosphorothiolate,

weighed 23 g.

3. As new compounds, of the general forroula:

Ps-z-R l R10 which Z is selected from the group consisting of sulphur and -S0 groups; R and R are allzyl groups containing 14 carbon atoms and R is selected from the group consisting of:

(i) substituted thiocarbamoyl groups s R t in which R is selected from the group con sisting of hydrogen and allzyl groups and R is an alkyl group; (ii) allroxythiocarbonyl groups 5 ll -C-0R where R is an allzyl group; (iii) a member selected from the group consisting of alkylthloalkyl and furfuryl groups; and (iv) where Z =SO a halogenophenyl group.

2. Compounds as defined in claim 1 in which the groups R and R contain from 1-12 carbon atoms.

3. Compounds as claimed in claim It in which the groups R and R are selected from the group consisting of methyl and ethyl groups.

4. 0,0-diethyl S-(RN-dimethyldithiocarbarnoyl) phosphorothiolate:

8. 0,0-di-n-buty1 S-(N,N dimethyldithiocarhamoyl) phosphorothiolate:

- (ctrnoni s-s- -N c'na= 9. 0,0-di-n-butyl S (N,N diethyldi-thiocarbamoyl) phosphorothiolate: I

, (C4HaO)gi"SS -N(C;H;) 10. 0,0-diethyl S-(ethoxydithiocarbonyl) phosphorothiol ate:

11. 0,0-diethyl S-(Z mercaptoiurfuryl) phosphorothiolate:

it i (C;HO)=PS-S-CH:.C or:

12. 0,0-diethyl S-(fi-thioethyl-thioethyl) Lhiolate:

phosphoro- 0 ll ZIIs )3P-S-SCzH S-Cgl:i5 13. A pesticidal composition comprising in association with a carrier at least one compound of the general formula:

R0 0 \li PSZ-R in which Z is selected from the group consisting of sulphur and -SOg groups;

R and R are alkyl groups containing 1-4 carbon atoms and R is selected from the group consisting of:

(i) substituted thiocarbamoyl groups 5 R1 C N lit in which R is selected from the group consist ing of hydrogen and alkyl groups and R is an alkyl group; (ii) alkoxythiocarbonyl groups enna where R is an alkyl group;

(iii) alkyl groups, alkylthioalkyl groups and furfuryl, and,

(iv) where Z=-SO phenyl, alkylphenyl and halogenophenyl groups.

14. A composition as defined in claim 13 in which the groups R and R containfrom 1-12 carbon atoms.

15. A composition as claimed in claim 13 in which the groups R and R are selected from the group consisting of methyl and methyl groups.

16. A composition as defined in claim 13 in which R is an alkyl group containing 1-12 carbon atoms.

17. A composition as defined in claim 16 in which R contains 1-4 carbon atoms.

18. A process for the preparation of compounds of the general formula:

in which Z is selected from the group consisting of sulphur and -SO groups; R and R are alkyl groups containing 1-4 carbon atoms and R is selected from the group consisting of:

(i) substituted thiocarbamoyl groups in which R is selected from the group consisting of hydrogen and alkyl groups and R is an alkyl group;

(ii) alltoxythiocarbonyl groups s l -o-on where R is an alkyl group;

(iii) a member selected from the group consisting of alkylthioalkyl and furfuryl groups; and

(iv) where Z=--SO phenyl, alkylphenyl and halogenophenyl groups,

which process comprises condensing a compound of the general formula:

where R and R have the meanings set. forth above and X is selected from the group consisting of chlorine, bromine and iodine with a compound of the general formula:

where Z and R have the meanings set forth above and M is selected from the group consisting of hydrogen, alkali metals and ammonium.

References Qited in the file of this patent UNlTED STATES PATENTS 2,585,813 McDermott Feb. 12, 1952 2,648,696 Whetstone Aug. 11, 1953 2,818,364 Birum Dec. 31, 1957 2,828,241 Birum Mar. 25, 1958 2,891,059 Malz et a1. Iune'l6, 1959 OTHER REFERENCES Kabachnik ct 211.: Chem. Abst., 50, 8499, (1956). Van Wazer: J. Am. Chem. Soc, 78, 572-4 (1956). Truchlik et al.: chem'Zvesti, 11, 24-29 (1957). 

1. AS NEW COMPOUNDS, COMPOUNDS OF THE GENERAL FORMULA: 